CD751 - Sanwa Electric Instrument Co., Ltd.
Contents
1. 320 pA 3200 A 32mA 320mA AC 40Hz 400Hz CD731 40Hz 1kHz CD751 AC DC At Fig 11 5 6 22. 2 4 4 _ 3 101 0021 03 3253 4871 1 2 3 4 5 6 5
3. Ed Ade Clk Z OTrueRMS Root Meen Square CF 3 3 jy pg J Oto PEAK Vrms Vavg P Vrms Vrms Vavg Ea 0 ZT 1 414 1 000 0 900 1 414 1 111 o H 1 000 1 000 1 000 1 1 000
4. CATT CATI CATI mn 8 2 CL11 HV 60 CL 20D CL22AD CL33DC CSP 8 3 2345C 80 RH cD731 WE 320 0mV 0 5 rdg 2dgt 100MQ 3 200V 11MQ 32 00V 0 9 rdg 320 0V 0 9 rdg 2dgt 1000V 10MQ 3 200V 11MQ 32 00V 1 2 rdg 40 400Hz 320 0V
5. lt gt lt gt gt lt gt 5 2X20mm 0 5A 250V 42 40 2 120 10 FO301 300A 6 3X32mm 20A 250V 457 435 22 120 10 FOO09 1000A 7 3 TEL 03 3253 4871 FAX 03 3251 7022 TEL 06 6631 7361 FAX 06 6644 3249 mga 0120 51 3930 9 30 12 00 13 00 17 00 I http www sanwa meter co jp 8 te 8 1 CD731 751 AC CD731 CD751 3200 32 OL
6. lt gt 0 5A 250V 5 2X20mm 300A 20A 250V 6 3X32mm 1000A Fig 17 6 4 Az 1 2
7. O L O L O L 5 5 1 A 1 2 aes REFAN a8 YP OSMEIHEAL T 1 COM I
8. bop a SUN 3 5 2 V A 1 2 3 5 2 1 DCV DC1000V 1 2 320mV 1000V 5 3 DCV ido
9. D H D H 10 OFF A OFF OFF
10. 3V Anode Cathode Fig 9 5 6 A AF amp 1 2 3 Power Power Fig 10 5 6 1 DC AC LA mA DC AC 320mA 1 2 32 zA 320mA 5 DC AC 3 A mA DC AC
11. 2 DC1000V 3 YV COM DCV 1000V 0 1 kV 5 7 2 7 CL 20D AC200A 1 hee a vitae ni Ze En 50 60HzO TEEWCEO GE 2 20A 200A 2 3 V COM ACV
12. P 7 5 5 1 6 2 IE P 24 BHA 6 3 AZF 1 2 3 lt gt G
13. ee D ABER p KO AS U 1 1 Aa KO HUB ER A DC AC Q s 1 2 1 6kVA 2 AC30Vrms 42 4Vpeak DC60V 3
14. ON OFF V 0 zA mA A SHIFT 1 gt 1 RNG HOLD A mA RH DATA HOLD
15. 5 2 2 ACV AC750V 1 2 3 2V 750V 4 3 ACV Fig 6 lt AC gt CD731 CD731 40 400Hz 9 CD751 1 2
16. 1 3V COM 30M O L 7 Resistor Fig 7 5 4 A 1 2 w 3200
17. his warranty is valid only within Japan sanla 2 4 4 101 0021 03 3253 4871 2 7 2 556 0003 06 6631 7361 SANWA ELECTRIC INSTRUMENT CO LTD Dempa Bldg 4 4 Sotokanda 2 Chome Chiyoda Ku Tokyo Japan VEGETABLE IL INK 10 1001 2040 2040
18. 3 2V 20A 200A 0 DC20A 0 1 AC20A 100 DC200A 1 AC200A 1000 5 7 4 CL33DC DC300A 1 2 30A 300A 2 3 V COM DCV 320mV 30A
19. AC 40Hz 400Hz CD731 40Hz 1kHz CD751 A 5A 5 7 A B oe Se eee oan ae 2 5 7 1 HV 60 DC3OkV A 1 2 DC30kV Ze 3 4 1
20. 1 3V 200 Extension cord j a 2 Fig 8 55 AF 1 2 F wL
21. 3 4 5 P 24 8 7 7 1 3 1 7 2 1 2
22. BT B 2 12 23 5C 80 RH MOROZE O 40 C 80 RH MOROZE 10 50 70 RH 2000m II 3 R6 2 1 8mW TYP DCV CD731 8mW TYP DCV CD751 10 5 2X20mm 0 5A 250V RNN 4 6 3X32mm 20A 250V 1000A 165 5 H X78 W X41 5 D mm 310g CD731 315g CD751 ft m 1 H 70 TL21 1 IEC 1010 TI EN61010 1 DC1000V AC750V TI EN50081 1 EN55022 EN50082 1 EN61000 4 2 EN50082 1 EN61000 4 3 EN50082 1 ENV50204 a
23. 15 1 3 DCV DCI000V DC1000V AC750V ACV AC750V PEAK MAX 1000V NN DC AC500V ea PEAK MAX 700V ae DC AC32A 05A 250V DC AC 3204 A 3200 A DC AC mA ek oan DC AC 320mA 05A 250V DC AC DC AC 20A 20A 10 DC AC 3200 nA 0 5A 250V 20A 250V 2 21 2 2 IEC1010 1 3200 10 CD751 CD731
24. 2dgt 0 2mV 1 SAFETY PRECAUTIONS Before use read the following safety precautions This instruction manual explains how to use your multimeter CD731 751 safely Before use please read this manual thoroughly After reading it keep it together with the product for reference to it when necessary The instruction given under the heading WARNING CAUTION must be followed to prevent accidental burn or electrical shock 1 1 Explanation of Warning Symbols The meaning of the symbols used in this manual and attached to the product is as follows AN Very important instruction for safe use The warning messages are intended to prevent accidents to operating personnel such as burn and electrical shock The caution messages are intended to prevent damage to the instrument ss DG Glaund AC Plus Q Resistance Minus 9 Continuity Fuse gt Diode Double insulation 1 2 Warning Instruction for safe use A WARNING To ensure that the meter is used safely Be sure to observe the instruction when using the instrument 1 Never use meter on the electric circuit that exceed 6kVA 2 Pay spe
25. 3 6 4 5 205 8604 4 7 15 TEL 042 554 0113 FAX 042 555 9046 5
26. se 47 5 7 1 HV 60 anon 17 5 7 2 CL 20D 18 5 7 3 CL 22AD 19 5 7 4 CL33DC 20 6 6 1 WR RR EE RR RE E ALAT 6 2 Ee 6 3 6 4 Z 7 1 7 2 7 3 8 fk 8 1 Seer eee ee eee ee ee ee eee eee 8 2 8 3 ie CONTENTS 1 SAFETY PRECAUTIONS Before use read the following safety precautions 1 1 Explanation of Warning Symbols Peri ire eee oe 1 2 Warning Instruction for safe use use 1 3 Maximum Overload Protection Input re 2 APPLICATION AND FEATURES 2 1 Application 2 2 Features eelseeeoeoeeeooo 3 NAME OF COMPONENT UNITS 3 1 Multimeter Test leadS pp 31 3 2 Display Preeeeeee eee ee ree ee rere ere ree errr eee ee ee eee ere reer eee ee reer eee ey 32 4 DESCRIPTION OF
27. 1 732 1 000 0 866 1 732 1 155 1 1 x 2 000 2 D 2 D JL M1 p T AC DC 0 2 z 1000V 5 3 Q 30MO A amp 1 2 3200 30M 6 3 0
28. 4 5 6 1 7 Cites 8 9 10 11 12 13 14 1
29. DC AC20A DC AC 20A A 1 2 10 3 5 4 1 20A 2 20A 1 DC AC 3 20A 20A 20A DC AC
30. 1 Application Checking the continuity of wiring and selecting wires 2 How to use See fig8 page12 Connect the test lead of the black plug to the COM input terminal and the red plug to the input terminal Set the function switch at 9 F function Apply the red and black test pins to a circuit or conductor to measure The continuity can be judged by whether the buzzer sounds or not After measurement release the red and black test pinsfrom the object measured The buzzer sounds when the resistance in a circuit to measure is less than about 200 The input terminals release voltage is about 1 3V 5 5 Testing Diode gt Z WARNING Never apply voltage to the input terminals 1 Application The quality of diodes is tested 2 How to use See fig9 page13 Connect the test lead of the black plug to the COM input terminal and the red plug to the input terminal Set the function switch at function and push the shift switch Apply the black test pin to the cathode of the diode and the red test pin to the anode Make sure that the display shows a diode forward voltage drop Apply the red test pin to the cathode of the diode and the black test pin to the anode Make sure that the display is the same as that when the test leads are released After measurement release the red and black test pins from the object measured Judgement When the items and are normal
31. 3 2V 20A 200A 20A 10 200A 100 5 7 3 CL 22AD DC AC200A 1 ACA 50 60Hz DCA 2 AC20 200A DC20A 200A 2 3 V COM DCA DCV 320mV ACA ACV
32. 32 y 20A 20A CD751 3 3 1 ree ake H 70 ei Te Or X FR COM lt i 2 20A S OG V Q D gt H i hA mA Fig 1 UM I C m TL 21 3 3 2 KEI Wg l MWB Y C gt LEE w ZEN ELE OAN N LFE a MKE semna I E HG samsy ws lt to eeHey tye LEIHEN EAA LEIE G A TEREE LEE LEELEE 4
33. Approx 10M Q 3 200V 32 00V 320 0V 750V 2 rdg 8dgt Approx 11M Q Approx 10M Q Accuracy In the case of sine wave AC 3 2Vrange 40 500Hz 32Vrangeup40 1kHz 320 00 3 200k Q 32 00kQ 320 0kQ 9 a Resistance 1 2 rdg 2dg Q 3 200M Q 2 0 rdg 2dg 5 0 rdg 2dg 30 00MQ Open voltage Approx 1 3V The measurering current changes according to the resistance of the resistance measure 32 00 wA 320 0 4 A 3200 A 32 00mA 320 0mA 1 4 rdg 2dg Approx 5K Q Approx 500 Q Approx 5 Q 20 00A 2 0 rdg 2dg Approx 0 0050 32 00 4A 320 0 4A 3200 nA 1 8 rdg 10dgt 32 00mA 320 0mA Approx 5K Q Approx 500 Q Approx 5 Q 20 00A 2 5 rdg 10dgt Approx 0 0050 Accuracy in the case of sine wave AC 40 1kHz Open voltage Approx 1 3V Buzzer sounds at approx 20Q Max Open voltage Approx 3V rdg reading dgt digits Accuracy in the case of sine wave AC er near places where strong electromagnetic waves Do not use the tes and trance are generated or strong electrical voltages are generated Specifcations and external appearance of the product described above may be revised for modification without prior notice MEMO MEMO sanla CD731 CD751 No
34. 300A 0 30A 0 1 300A 1 6 A 1 2 1 1 6 1 1 2
35. Storage Tempera ure Humidity Range 10 50 C 70 RH max No condensation Environmental Condition Operating altitude lt 2000m Pollution degree II Powe r Supply R06 IEC dry battery 2 pieces Power Consumption Approx 1 8mW TPY at DCV CD731 Approx 8mW TPY at DCV CD751 Battery Life 0 min auto power save Fuse protection 0 5A 250V 5 2 20mm Blowout capacity 300A 20A 250V 6 3 X32mm Blowout capacity 1000A Dimension and Weight 65 5 H X78 W X41 5 D mm approx 310g CD731 approx 315g CD751 Accessories nstruction manual 1 Holster H 70 Test lead TL 21 1 Safety Designed to protection Class requirement of IEC 1010 1 overvoltage category III Max DC AC600V EN61010 1 Max DC1000V AC750V overvoltage category II EN50081 1 EN55022 EN50082 1 EN61000 4 2 EN50082 1 EN61000 4 3 EN50082 1 ENV50204 MEASUREMENT CATEGORY CATT Secondary electrical circuit connected to an AC electrical outlet through a transformer or similar device CAT II Primary electrical circuits in equipment connected to an AC electrical outlet by a power cord CATI Primary electrical circuits of heavy equipment connected directly to the distribution panel and feeders from the distribution panel to outlets 8 2 Optional Accessories Clip adapter CL 11 HV probe HV 60 Corrent probe CL 20D CL 22AD CL33DC Carring casc C SP 8 3 Measurement
36. 3 200M Q 2 0 r 2dg 30 00M O 5 0 r 2dgt 1 3V 1 ELT DCA 32 00 4 A 320 0 nA 3200 uA 32 00mA 320 0mA 1 4 r 2dgt 5kQ 5000 50 20 00A 2 0 r 2dg 0 0050 ACA 32 00 A 320 0 A 3200 uA 32 00mA 320 0mA 1 8 rdg 10dgt 5kQ 5000 50 40 1kHz 20 00A 2 5 rdg 10dgt 0 0050 9 200 1 3V 3V rdg reading dgt digits DCmV 100 0mV 320mV 0 5 rdg 2dgt RA 100 0 mV X0 5 2 det 0 7 mV 100 0 mV 0 7 mV 99 3 100 7mV
37. CD731 CD751 DIGITAL MULTIMETER INSTRUCTION MANUAL C 1 1 1 1 1 2 1 1 3 RA ERR cases T 2 2 2 1 oo z 2 2 JE eeeessssssssssssssessssssssssssssssssssessessssssssssssssssssss 3 3 3 1 3 3 2 Pe 4 4 5 5 5 1 NR RRR ARE ENE EE RIE ER NEST RR 7 5 2 V PP 8 5 2 1 DCV REET ER ET ER 8 5 2 2 ACV ER RES Wh tt eR RR its 9 5 3 Q SIR EU THESE EN E Rt kn 11 5 4 wy 12 5 5 RR RIE RR ERE RRR ERR RR RE RE Rt 13 5 6 A ROR RRR EEE RR RE ERR RR RR RR RE EER RRR RE 14 5 6 1 DC AC pA mA ee 14 5 6 2 DC AC20A 16 5 7
38. 1 The panel and the case are not resistant to volatile solvent and must not be cleaned with thinner or alcohol For cleaning use dry soft cloth and wipe it lightly 2 The panel and the case are not resistant to heat Do not place the instrument near heat generating devices such as a soldering iron 3 Do not store the instrument in a place where it may be subjected to vibration or from where it may fall 4 For storing the instrument avoid hot cold or humid places or places under direct sunlight or where condensation is anticipated Following the above instructions store the instrument in good environment 7 AFTER SALES SERVICE 7 1 Warranty and Provision Sanwa offers comprehensive warranty services to its end users and to its product resellers Under Sanwa s general warranty policy each instrument is warranted to be free from defects in workmanship or material under normal use for the period of one 1 year from the date of purchase This warranty policy is valid within the country of purchase only and applied only to the product purchased from Sanwa authorized agent or distributor Sanwa reserves the right to inspect all warranty claims to determine the extent to which the warranty policy shall apply This warranty shall not apply to fuses disposables batteries or any product or parts which have been subject to one of the following causes 1 A failure due to improper handling or use that deviates from the
39. 750V 320 00 3 200kQ 32 00kQ 320 0kQ 3 200MQ 2 0 rdg 2d 30 00MQ 5 0 rdg 2d 32 00 nA 5kQ 320 0 A 32004A 1 4 rdg 5000 DCA 32 00mA 320 0mA 59 20 00A 2 0 rdg 4 0 0050 32 00 4 A 5kQ 320 0 A 3200 x A Ti 1 8 rdg 5dgt 5000 Beh 32 00mA 950 40 400Hz 320 0mA 20 00A 2 5 rdg 5dgt 90 005 Q 200 CY 1 3V w oH 3V 10MQ 1 2 rdg 2d 1 3V cD751 ACV 5 100 3 1 320 0mV 0 5 rdg 2dgt 100MQ 3 200V 32 00V 320 0V 1000V 0 9 rdg 2dgt 11MQ 10MQ 3 200V 32 00V 320 0V 750V 1 2 rdg 8dgt 11MQ 10MQ 320 4 00Hz BY YUL 40 1kHz 320 00 3 200k Q 32 00k Q 320 0k Q 1 2 r 2dg
40. instruction manual 2 A failure due to inadequate repair or modification by people other than Sanwa service personnel 3 A failure due to causes not attributable to this product such as fire flood and other natural disaster 4 Non operation due to a discharged battery 5 A failure or damage due to transportation relocation or dropping after the purchase 7 2 Repair Customers are asked to provide the following information when requesting services 1 Customer name address and contact information 2 Description of problem 3 Description of product configuration 4 Model Number 5 Product Serial Number 6 Proof of Date of Purchase 7 Where you purchased the product Please contact Sanwa authorized agent distributor service provider listed in our website in your country with above information An instrument sent to Sanwa agent distributor without those information will be returned to the customer Note 1 Prior to requesting repair please check the following Capacity of the built in battery polarity of installation and discontinuity of the test leads 2 Repair during the warranty period The failed meter will be repaired in accordance with the conditions stipulated in 7 1 Warranty and Provision 3 Repalr after the warranty period has expired In some cases repair and transportation cost may become higher than the price of the product Please contact Sanwa authorized agent service provider in advance The mini
41. FUNCTIONS ppp 33 5 MEASUREMENT PROCEDURE 5 1 Start up Inspection eossososossss 35 5 2 Voltage measurement pp 36 5 2 1 DCV Measurement s 36 5 2 2 ACV Measurement 36 5 3 Resistance Measurement Q oo 38 5 4 Checking Continuity oo 38 5 5 Testing Diode gt H ee see 39 5 6 Current Measurement A e 40 5 6 1 DC AC pA MA iri 40 5 6 2 DC AC 20A oo 41 5 7 How to use optional products AD 5 7 1 HV Probe HV 60 see 42 5 7 2 AC Clamp Probe CL 20D 42 5 7 3 DC AC Clamp Probe CL 22AD sore AB 5 7 4 DC Clamp Probe CL33DC oo 43 6 MAINTENANCE 6 1 Maintenance and inspection ee 6 2 Calibration oo 6 3 How to Replace Battery and Fuse s 6 4 Storage oo 45 7 AFTER SALE SERVICE 7 1 Warranty and Provision oo 46 7 2 Repair 46 7 3 Sanwa web site Pere errr rere rere eter eee eee ee eee ee eee eee eee rere 47 8 SPECIFICATIONS 8 1 General Specifications 47 8 2 Optional Accessories 49 8 3 Measurement Range and Accuracy ee 49 1 CD731 751
42. e se A Voltage and current input prohibited DC AC500V or PEAK MAX 700V DC AC 32 uA DC AC 32 4 A 0 5A 250V Fuse protected DC AC 3204 A 32004 A DC AC 3200 4 A 0 5A 250V Fuse protected DC AC 32mA 320mA DC AC 320mA 0 5A 250V Fuse protected DC AC 20A DC AC 20A 10sec 20A 250V Fuse protected 2 APPLICATION AND FEATURES 2 1 Application This instrument is portable multimeter designated for measuremaent of weak current circuit 2 2 Features The instrument has been designed in accordance with the safety standard IEC 1010 1 3200 counts and circular bar graph available A stand has adhered Data hold and range hold Auto power off CD731 Auto power save CD751 10min The current function is the auto range except 32 4 A 20A The testlead fixing feature and holster has adhered AC Measurement is the True RMS CD751 Main unit case and the circuit board is made of fire retarding materials 3 NAME OF COMPONENT UNITS 3 1 Multimeter Test leads Holster H 70 Display Data hold switch Test lead fix 5 Range hold Shift switch ME CD Q switch Power switch and function switch COM input Safety cover terminal 20A input terminal V Q gt A uA mA input terminal Stand Fig 1 Test probe
43. red Test pin Fi d Test robe wc lack inger guards gt PS m ee Plug 5 J m Test lead TL 21 3 2 Display z 6 je s UdeJ6 Jeg 1ulod jewioaq elep ude 6 Jeq 104 Aejdsip Auelod snui i 9 j Jeq p ds 1U6IH g Aejds Buns STITT ws ejdsip epoip Buse mag lueuueJnseew oy q Aejdsip pjoy eleq t em Bep jesawnu 104 Aejdsip Auelod snui BuluJeW g5euoSID lelle9 Aeldsip yun lu ui inse W AeldsID plod a5uey Aeldsip Alounlunoo Burjsey9 eldsip elep BJ9UJnN Aejdsip 1u uu insie uu 9q 4 DESCRIPTION OF FUNCTIONS Power switch and function switch Turn this switch to turn on and off the power and select the functions of V Q A mA A OShift switch When this switch is pressed gt the modes change as follows In the case of current function the mode change as gt gt In the case of the mode change as gt ORange hold switch R H Pressing this switch once sets the manual mode and the range is fixed Once the manual mode is set the range moves each time this switch is pressed only V Q A mA Checking the unit on the display and the place of the decimal point select a desired range To return to the auto mode keep pressing this switch until RH on the display disappears Data hold switch D H When this switch is pressed the data display at that time continues DH lights on the display W
44. Range and Accuracy Accuracy assurance range 23 5C 80 RH MAX No condensaition CD731 Function Range Accuracy Input Resistance Remarks B20 0mV 0 5 rdg 2dg 100M 9 3 200V Approx 11M Q 32 00V o 320 0V 0 9 rdg 2dgu Approx10MQ 1000V 3 200V Approx 11M 0 Accuracy in the 32 00V 1 2 rdg 5dgt case of sine wave 320 0V Approx 10M Q AC 40 400Hz 750V 320 0 Q f 3 200k Q 1 29 rdg 2dg Open vol age Approx 1 3V Resistance 32 00kQ The measurering current changes Q 320 0kQ according to the resistance of the 3 200MQ 2 0 rdg 2dg resistance measure 30 00MQ 5 0 rdg 2dg 32 00 A Approx 5K Q 320 0 nA 3200 A 1 4 rdg 2dg 32 00mA 320 0mA 20 00A 2 0 rdg 2dg Approx 0 005 0 Approx 500 0 Approx 5 Q 32 00 A Approx 5K Q 320 0 4A 3200 4 A 1 8 rdg 5dg 32 00mA 320 0mA 20 00A 2 5 rdg 5dgt Approx 0 0050 Buzzer sounds at approx 20Q Max Open voltage Approx 1 3V Approx 5000 Accuracy in the case of sine wave Approx 5 Q AC 40 400Hz Open voltage Approx 3V CD751 CF lt 3 1 Range Function Accuracy Input Resistance Accuracy of ACV Specified at 5 100 of the range Remarks 320 0mV 0 5 rdg 2dgt 2100MQ 3 200V 32 00V 320 0V 1000V 0 9 rdg 2dgt Approx 11MQ
45. cial attention when measuring the voltage of AC 30Vrms 42 4 Vpeak or DC 60V or more to avoid injury 3 Never apply an input signals exceeding the maximum rating input value 4 Never use meter for measuring the line connected with equipment i e motors that generates induced or surge voltage since it may exceed the maximum allowable voltage broken the fuse 6 Never use uncased meter 7 Be sure to use a fuse of the spesified rating or type Never use a Substitute of the fuse or never make a short circuit of 5 Never use meter if the meter or test leads are damaged or 8 Always keep your fingers behind the finger guards on the probe when making measurements 9 Be sure to disconnect the test pins from the circuit when changing the function or range 0 Be sure to disconnect the test pins from the circuit when changing the function or range 1 Never use meter with wet hands or in a damp environment 2 Never open tester case except when replacing batteries or fuse Do not attempt any alteration of original specifications 3 Do not use the device near an item of strong electromagnetic generation or a charged item 4 To ensure safety and maintain accuracy calibrate and check the tester at least once a year 5 Indoor use 1 3 Maximum Overload Protection Input Function DCV ACV Maximum rating input value DC1000V AC750V Maximum overload protection input DC1000V AC750V or PEAK MAX 1000V Q
46. ctor Form factor P Vrms value Vavg PNrms P Vrms Vavg Sine Lay Wave Zx 1 414 1 000 0 900 1 414 1 111 Square Wave gt L 1 000 1 000 1 000 1 1 000 Triangular P u L Z 1 732 1 000 0 866 1 732 1 155 Input Waveform kr 1 Pulse 1 2 000 2YD 2 D D T 1 er vD VD Voltages and Crest Factors of Various Waveforms t may malfunction when measuring voltage current in the inverter circuit 5 3 Resistance Measurement Q WARNING Never apply voltage to the input terminals 1 Application Resistance of resistors and circuits are measured 2 Measuring ranges 3200 30MQ 6 range 3 Measurement procedure See fig7 page11 Connect the black plug of the test lead to the COM input terminal and the red plug to the Q input terminal Set the function switch at Q function Apply the black and red test pin to measured circuit Read the value on the display After measurement remove the red and black test pins from the circuit measured f measurement is likely to be influenced by noise shield the object to measure with negative potential test lead black f a test pin is touched by a finger during measurement measurement will be influenced by the resistance in the human body to result in measurement error The input terminals release voltage is about 1 3V 5 4 Checking Continuity AN WARNING Never apply voltage to the input terminals
47. e conducted by the dealer For more information please contact the dealer 6 3 How to Replace Battery and Fuse A WARNING 1 lf the rear case is removed with input applied to the input terminals you may get electrical shock Before starting the work always make ure that no inputs is applied 2 Be sure to use the fuse is same rating so as to ensure safety and performance of tester 3 When operator remove the rear case do not touch the internal parts or wire with hand How to replace the battery gt Remove the holster from the meter Opening the stand of the meter reverse side and remove the screw with a screwdriver Take out the battery and replace it with a new one Attach the rear case and fix it with the screw The stand and holster are returned How to replace the fuse gt Fuse of the Specified Rating and Type 0 5A 250V 5 2X 20mm Blowout capacity 300A 20A 250V g 6 38 X 32mm Blowout capacity 1000A Ceramic DRemove the holster from the meter Opening the stand of the meter reverse side and remove the screw with a screwdriver Pull out the fuse out of holder on the circuit board and replace it Put back the rearcase where it was and tighten the screw Check and see whether or not indications of respective ranges are normal Battery R6 1 5VX2 There is a inside Screw of rear case 20A 250V Fuse 0 5A 250V Fuse Fig 17 6 4 Storage N CAUTION
48. er apply an input signals exceeding the maximum rating Input value 2 Be sure to disconnect the test pins from the circuit when changing the function 3 Always keep your fingers behind the finger guards on the probe when making measurements 5 2 1 DCV Measurement Maximum rating input value 1000VDC 1 Applications Measures batteries and d c circuits 2 Measuring ranges 320mV 1000V 5 ranges 3 Measurement procedure See fig5 page8 DConnect the test lead of the black plug to the COM input terminal and the red plug to the V input terminal Set the function switch at DCV function Apply the black test pin to the negative potential side of the circuit to measure and the red test pin to the positive potential side Read the value on the display After measurement remove the red and black test pins from the circuit measured 5 2 2 ACV Measurement Maximum rating input value 750VAC 1 Applications Measures sine wave AC voltages such as lighting voltages 2 Measuring ranges 3 2V 750V 4 ranges 3 Measurement procedure See fig6 page9 Connect the test lead of the black plug to the COM input terminal and the red plug to the V input terminal Set the function switch at ACV function Apply the black and red test pin to measured circuit Read the value on the display After measurement remove the red and black test pins from the circuit measured Caution for ACV measurement of CD731 S
49. g to the V terminal Set the function at DCV and set the 320mV range with the range hold switch Select either 30A or 300A with selector knob of clamp probe The zero point varies when the DCA is mesured so be sure to check that the moltimeter indicates zero If not zero adjust the indication to the zero point by torning the zero adjusting knob OADJ Open the clamp part have electric line one line clamped Read the value on the display in A unit and when current probe of the 30A range after multiplying indicated value by 0 1 and the 300A range after multiplying indicated value by 1 After measurement open the clamp part and release clamp probe from the electric wire 6 MAINTENANCE WARNING 1 This section is very important for safety Read and understand the following instruction fully and maintain your instrument properly 2 The instrument must be calibrated and inspected at least once a year to maintain the safety and accuracy 6 1 Maintenance and inspection 1 Appearance Is the appearance not damaged by falling 2 Testleads and fuse Is the cord of the test leads not damaged Is the core wire not exposed at any place of the test leads If your instrument falls in any of the above items do not use it and have it repaired or replace it with a new one Make sure that the test leads are not cut referring to the section 6 2 Calibration The calibration and inspection may b
50. hen the measuring input changes the display will not change When this switch is pressed again the hold status is canceled you can return to the measuring status DH on the display disppears Auto power off Auto power save This equipment incorporates an auto power off and save which turns off the display in about 10 minutes to save power Just before the auto power save is activated a warning sound is issued If you want to continue to use the equipment press the data hold switch If you will not use the equipment for long hours keep the functions switch at OFF How to Use the Stand Please use the stand that there is on the side of rear case like a figure 5 MEASUREMENT PROCEDURE 5 1 Start up Inspection WARNING 1 Never use meter if the meter or test leads are damaged or broken 2 Make sure that the test leads are not cut or otherwise damaged START nit and test leads lt damaged Main u Damaged No damage Stop using it and Dice ue 3 Check continuity of MI test leads Short the red and Connect the test black test pins lead of black plug to the COM terminal Connect the test lead of red plug to the terminal Display shows 00 0 01 0 Set the function o problem switch at 9 Start measurement Fig 4 5 2 Voltage measurement WARNING 1 Nev
51. ince this instrument employs the means value system for its AC voltage measurement circuit AC waveform other than sine wave may cause error There occurs error under such frequencies other than specified specification Caution for ACV measurement of CD751 True Root Mean Square Value When measurement is taken by average value detection r m s no error is caused as the input signal is sine wave with no distortion However if the input waveform is distorted sine wave or non sinusoidal wave conversion to root mean square values is very difficult resulting in a large error When measurement is taken by true r m s the measurement value of input signal becomes the scale of the signal power and therefore provide more effective values than those obtained by average value detection This multimeter imploys this true RMS Root Mean Square circuit which enables measurement of sine wave and non sinusoidal waves like square wave and triangular wave in r m s Crest Factor The crest factor CF is expressed by a value obtained by dividing the peak value of the signal by its RMS value Most common waveforms such as sine wave and triangular wave have a relatively low crest factor Waveforms similar to a pulse train of low duty cycle have a high crest factor The voltages and crest factors of typical waveforms are shown in the table Note that measurement should be taken with the crest factor below 3 O to Peak RMS value Average Crestfa
52. mum retention period of service functional parts is 6 years after the discontinuation of manufacture This retention period is the repair warranty period Please note however if such functional parts become unavallable for reasons of discontinuation of manufacture etc the retention period may become shorter accordingly 4 Precautions when sending the product to be repaired To ensure the safety of the product during transportation place the product in a box that is larger than the product 5 times or more in volume and fill cushion materials fully and then clearly mark Repair Product Enclosed on the box surface The cost of sending and returning the product shall be borne by the customer 7 3 SANWA web site http www sanwa meter co jp E mail exp_sales sanwa meter co jp 8 SPECIFICATIONS 8 1 General Specifications Measuring Method Dual integration Display Counter approx 3200counts Bar graph 32 segments max Range Selection Auto and Manual ranges Over Display O L mark indication Polarity Automatic selection only js displayed Battery Discharge If the internal battery has been consumed and the voltage drops the display shows Samp ing Rate Approx 2times sec numeral display Approx 12times sec bar graph Accuracy Tempera Assurance ure Humidity Range 23 5 C 80 RH max No condensation Operating Tempera ure Humidity Range 0 40 C 80 RH max No condensation
53. nt Measurement Maximum rating input value DC AC 20A A WARNING 1 Never apply voltage to the input terminals 2 Finish measurement within 10seconds to prevent heat generation 3 Provide intervals of 5 minutes or longer between measurements to prevent heat generation 4 Perform measurement with the leads kept straight to prevent overheat 1 Applications Current in DC and AC circuit is measured 2 Measuring ranges 20A 3 Measurement procedure See fig12 page16 Connect the test lead of the black plug to the COM input terminal and the red plug to the 20A input terminal Set the function switch at 20A function and select either DC or AC with the shift switch Apply the black test pin to the negative potential side of the circuit to measure and the red test pin to the positive potential side Read the value on the display After measurement remove the red and black test pins from the circuit measured f the display will not change when an input signal is applied measurement is not possible a probable cause is a blown fuse The accuracy guaranteed frequercy range is 40Hz to 400Hz CD731 40Hz 1kHz CD751 For the 20A range no unit symbol will be indicated 5A Continuous 20A for 10 secound max with 5 minutes cool down interval 5 7 How to use optional products WARNING 1 Never apply input signals exceeding the maximum rating input value of optional products 2 Be sure t
54. o disconnect the test pins from the circuit when changing the function 5 7 1 HV Probe HV 60 Maximum measurement value DC30kV WARNING 1 The probe is designed for the measurement of very small DC circuit Never use the probe to measure high voltage in power lines Such as transmission and distribution lines it is very dangerous 2 Never apply an input signals exceeding the maximum rating 30kV of HV prove 3 Be sure to disconnect the test pins from the circuit when changing the function 4 Alwaya keep your fingers behind the finger guards on the probe when making measurement Measurement procedure2 See fig 13 page 17 Connect the black plug of the HV Probe to the COM termina and the red plug to the V terminal Set the function at DCV and set the 1000V range with the range hold switch First connect the black clip of the probe to the earth line in the circuit to be measured and then apply the measuring pin on the probe to measuring point Read the value on the display in kV unit after multiplying indicated value by 0 1 5 7 2 AC Clamp Probe CL 20D Maximum measurement value AC200A Measurement procedure2 See fig 14 page 18 DConnect the current probe of the black plug to the COM terminal and the red plug to the V terminal Set the function at ACV and set the 3 2V range with the range hold switch Select either 20A or 200A with selector knob of clamp probe Open the clamp
55. part have electric line one line clamped Read the value on the display in A unit and when current probe of the 20A range after multiplying indicated value by 10 and the 200A range after multiplying indicated value by 100 After measurement open the clamp part and release clamp probe from the electric wire 5 7 3 DC AC Clamp Probe CL 22AD Maximum measurement value DC AC200A lt Measurement procedure See fig 15 page 19 Connect the current probe of the black plug to the COM terminal and the red plug to the V terminal Set the function at DCV or ACV Set the range is 320mV with range hold switch at DC measurement Set the range is 3 2V with range hold switch at AC measurement Select either 20A or 200A with selector knob of clamp probe The zero point varies when the DCA is mesured so be sure to check that the moltimeter indicates zero If not zero adjust the indication to the zero point by torning the zero adjusting knob OADJ Open the clamp part have electric wire one line clamped Read the value on the display as follows DC20A gt multiplying by 0 1 AC20A multiplying by 100 DC200A gt multiplying by 1 AC200A multiplying by 1000 After measurement open the clamp part and release clamp probe from the electric wire 5 7 4 DC Clamp Probe CL33DC Maximum measurement value DC300A lt Measurement procedure See fig 16 page 20 Connect the current probe of the black plug to the COM terminal and the red plu
56. the diode is good The input terminals release voltage is about 3V 5 6 Current Measurement A A WARNING 1 Never apply voltage to the input terminals 2 Be sure to make a series connection via load See fig10 page14 3 Do not apply an input exceeding the maximam rated current to the input terminals 5 6 1 DC AC A mA Measurement Maximum rating input value DC AC 320mA 1 Applications Current in DC and AC circuit is measured 2 Measuring ranges 32 4 A 320mA 5 range 3 Measurement procedure See fig11 page15 Connect the black plug of the current probe to the COM input terminal and the red plug to the rz A mA input terminal Select either current function and select either DC or AC with the shift switch Apply the black test pin to the negative potential side of the circuit to measure and the red test pin to the positive potential side Read the value on the display After measurement remove the red and black test pins from the circuit measured f the display will not change when an input signal is applied measurement is not possible a probable cause is a blown fuse The current ranges of 320 A to 3200 A and 32mA to 320mA of this equipment are the auto ranges The ranges can also be fixed using the range hold switch The accuracy guaranteed frequency range 40Hz to 400Hz CD731 40Hz 1kHz CD751 For the A mArange no unit symbol will be indicated 5 6 2 Curre
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